231972398 has 8 divisors (see below), whose sum is σ = 397666992. Its totient is φ = 99416736.

The previous prime is 231972379. The next prime is 231972431. The reversal of 231972398 is 893279132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×231972398² = 107622386867740808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8284715 + ... + 8284742.

It is an arithmetic number, because the mean of its divisors is an integer number (49708374).

Almost surely, 2^231972398 is an apocalyptic number.

231972398 is a deficient number, since it is larger than the sum of its proper divisors (165694594).

231972398 is a wasteful number, since it uses less digits than its factorization.

231972398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16569466.

The product of its digits is 163296, while the sum is 44.

The square root of 231972398 is about 15230.6401047362. The cubic root of 231972398 is about 614.4389957543.

The spelling of 231972398 in words is "two hundred thirty-one million, nine hundred seventy-two thousand, three hundred ninety-eight".